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Standardization of Gyrinops Walla Gaertn. (Thymalaeaceae): Newly Discovered, Fragrant Industrial Potential, Endemic Plant from Sri Lanka

R.M. Dharmadasa*, Asitha Siriwardana, Kosala Samarasinghe, Adhihetty P.

Industrial Technology Institute, Bauddhaloka Mawatha, Colombo, Sri Lanka

Abstract: Gyrinops walla Gaertner. (Thymelaeaceae), is an endemic resinous plant used in traditional medicine, perfume production, incenses, aroma therapy and cosmetic industry. Due to the high economic value, large-scale smuggling of G. walla from Sri Lanka has been practiced for a long time. Therefore, present study was undertaken to study the phytochemical and volatile oil components of G. walla. Phytochemical analysis of leaf, bark and stems were performed according to the methods described in WHO guidelines. Aerial parts were hydro-distilled in a Clevenger-type apparatus for 8 h. Oil was analyzed using GC-MS and identification of components of volatile oils was carried out based on retention indices and fragmentation patterns of the mass spectra. Phytochemical screening of leaf, stem and bark crude extracts of G. walla revealed the presence of tannins, saponins, steroid glycosides, flavonoids and alkaloids in all three parts tested. Thin layer chromatographic profiles observed under UV light at 366 nm exhibited higher number of spots in CH₂Cl₂ extracts for all three parts followed by hexane and methanol fractions, respectively. Sky blue spot present in all three fractions [hexane (Rf = 0.83), dichloromethane (Rf = 0.66) and methanol (Rf = 0.77)] of stem extracts was characteristic to the stem extract. The yield of the essential oils obtained from stem parts of G. walla was 0.20 ± 0.01%. Major constituents, which exist more than 1% in heartwood of G. walla oil, were gamma-selinene (72.49%), 3-Phenyl-2-butanone (2.04%), 3-pentanone (2.02%), beta-patchoulene (1.37%) respectively. Present study reports the presence of preliminary phytochemicals, TLC finger prints and GC-MS analysis of essential oil of G.walla for the first time in Sri Lanka. Presence of high content of γ-selinene and β-patchoulene (73.86%) indicates potential for commercial production of world class perfume and other scented products.

Keywords: Gyrinops walla Gaertner, Thymelaeaceae, essential oil, Thin Layer Chromatography, GC-MS, phytochemicals

Received August 07, 2013; Revised October 12, 2013; Accepted October 14, 2013

Citation: R.M. Dharmadasa, Asitha Siriwardana, Kosala Samarasinghe, Adhihetty P., Standardization of Gyrinops Walla Gaertn. (Thymalaeaceae): Newly Discovered, Fragrant Industrial Potential, Endemic Plant from Sri Lanka. World Journal of Agricultural Research, 1 (6). 101-103. January 2013. doi:10.12691/wjar-1-6-1

1. Introduction

Gyrinops walla Gaertner. (Thymelaeaceae), commonly known as Walla Patta in Sinhala and Agarwood in English, is an endemic fragrance producing resinous plant grown in wet and intermediate zones in Sri Lanka [1]. Resin extracted from Gyrinops species has its unique fragrance and therefore, it is widely used as an ingredient in traditional medicine, world class perfume [2], incenses [3], aroma therapy [4], cosmetic and preservatives of accessories [5,6]. Moreover, agar wood is used as cultural and religious purposes across the Asia [7]. Due to the high economic value in perfumery and other industries excessive exploitation of Gyrinops and Aquilaria species from natural habitats have been reported from many countries [8]. Therefore, they are classified as endangered species in the international trade [8]. Gyrinpos walla is the only Gyrinpos species available in Sri Lanka. Since this species possess pleasant fragrance which has lucrative in Middle Eastern market where it is used as a component to manufacturing of expensive perfumes, large scale smuggling of G. walla from Sri Lanka has been practiced for a long time. In the context of conservation purpose, G. walla has been protected under the Flora and Fauna Protection Ordinance (FFPO) in Sri Lanka since 2004 and Convention on International Trade in Endangered Species (CITES) since 2005. Therefore, exploration of this valuable plant and scientific identification of plant material and volatile oil components which are responsible for fragrance, are timely important in order to ensure the sustainable utilization and conservation of this valuable plant.

2. Materials and Methods

2.1. Plant Materials

Leaf, stem and bark samples were obtained from fully matured G. walla plants grown in a home garden at Awissawella which belongs to low country wet zone in Sri Lanka. Herbarium specimen was prepared and deposited in institutional herbarium (HTSGW-21). Collected samples (1kg) were cut into pieces and air-dried for 3 days at room temperature (28 ± 2°C). Then materials were ground to coarse powder using grinder (Janke and Kundel, Germany). All solvents used for the extraction of phyto-chemicals were from Sigma Chemical Company (USA).

2.2. Sample Preparation for Chemical Analysis

Coarsely powdered plant material (10g) of leaf, bark and stem were sequentially extracted, separately with 50 mL of hexane, dichloromethane and methanol by using Soxhlet apparatus. The extract was concentrated at 45°C using rotovapour (Buchi Rotavapour, Type-R-114A29 B-480, Switzerland).

2.3. Phytochemical Screening and Thin Layer Chromatography (TLC)

Methanol extracts of leaf, bark and stem of G. walla were screened for preliminary phytochemicals such as alkaloids, flavonoids, saponins, steroidal glycosides and tannins according to the method described by Farnsworth [9]. Thin layer chromatographic analysis of plant extracts were performed according to the method described by Stahl [11] with slight modifications. Pre-coated Silica gel 60 GF₂₅₄ plates were used. Approximately 8 μL of each sample was spotted on the TLC plate, air-dried and placed in the chromatographic chamber previously saturated with the solvent system (Hexane 2: ethyl acetate 1: methanol 1) developed TLC plates were observed under UV 366 nm and after spraying with vanillin-sulfuric acid followed by heating at 105°C for 3-5 minutes.

2.4. Distillation of Essential Oil

Coarsely powdered heart wood sample (1kg) of G. walla were hydro distilled in a Clevenger-type apparatus for 8h. The volatile oils were dried over anhydrous sodium sulphate and stored in sealed vials at 4°C until analysis. The yield of the oils was calculated based on dry weight of plant materials.

2.5. GC-MS Analysis of Essential Oil

GC-MS analysis was performed on a Hewlett-Packard 6890 gas chromatograph fitted with a fused silica HP-5MS capillary column (30m × 0.25mm; film thickness 0.25μm). The oven temperature was programmed from 60 -280°C at 4 °C/min. Helium was used as carrier gas at a flow rate of 2 mL/min. The gas chromatograph was coupled to a Hewlett-Packard 6890 mass selective detector. The MS operating parameters were; ionization voltage, 70 eV; and ion source temperature, 200°C.

3. Results and Discussions

3.1. Phytochemical Screening

Phytochemical screening of leaf, stem and bark crude extracts of G. walla revealed the presence of tannins, saponins, steroidal glycosides, flavonoids and alkaloids in all three parts tested (Table 1).

Table1. Phytochemical analysis of heartwood of Gyrinops walla

3.2. Thin Layer Chromatography

Figure 1. Thin layer chromatogrammes of different parts of Gyrinops walla observed under UV 366 nm (1- Hexane fraction; 2-Dichloromethane fraction; 3- Methanol fraction; L- leaf; B- bark; S- stem solvent system Dichloromethane : Cyclohexane : Methanol 1 : 1 : 0.1)

Thin layer chromatographic profiles observed under UV 366 nm exhibited comparatively higher numbers of spots in dichloromethane extracts for all three parts (leaf, bark and stem) followed by hexane and methanol fractions, respectively Stem extracts exhibited a prominent sky blue spot for hexane (Rf = 0.83), dichloromethane (Rf = 0.66) and methanol (Rf = 0.77). In addition, the same spot was present in bark extracts of hexane and dichloromethane extract but did not present in methanol extract (Figure 1). Further, light pink colour spot at Rf = 0.30 was characteristic for leaf extract of hexane fraction. Finger print analysis using thin layer chromatography has become the most potent tool for standardization and quality control of plant materials and plant base herbal medicines due to its simplicity, cost effectiveness and reliability. Use of thin layer chromatographic profiles for quality control of Bacopa monnieri and its products [12], determination of active phytoconstituents present in hexane and aqueous extracts of Rumex vesicarius L. [13] and determination of quercetin in Calendula Officinalis [14] have been reported.

Although there were reports on resin composition of G walla found in Sri Lanka, [15], information on standardization and composition of essential oil, in the present study, essential oil was distilled by using hydro distillation, which is classically practiced method for oil extraction of agar wood [16]. Essential oil of G. walla was either reddish or yellowish brown in colour with intrinsic pleasant aroma. Oil percentage was 0.2% w/v. Results obtained in this study are in agreement with the values reported by previous work [17]. The oil content was varied from 0.15-0.85% w/v composition according to the method of inoculation. Further, variation of oil colour in different parts varied from greenish brown to dark reddish brown.. Results of GC-MS analysis of essential oil of G. walla are presented in Table 2.

Table 2. Essential oil composition of Gyrinops walla Gaertner

Total six chemical constituents were identified from the G. walla oil. As shown in Table 2, major constituents, which exist more than 1% in heartwood of G. walla oil, were γ-selinene (72.49%), 3-Phenyl-2-butanone (2.04%), 3-pentanone (2.02%) and beta-patchoulene (1.37%), respectively. All other constituents present were minor amounts (< 1%). Present results exhibited high content of γ-selinene (72.49%). Presence of special aroma containing compound such as γ-selinene and β-patchoulene (73.86%) might be responsible for the intrinsic pleasant aroma of oil fraction of G. walla. However, literature showed that the variation of chemical compositions and amount of individual components’ depend on the location [18], who compared chemical profiles of selected agar wood oils from peninsular Malaysia reported that 3-phenyl-2-butanone content was varied from 0.79 to 7.80%. In addition, he pointed out that chemical composition also exhibited the variation according to the location. Moreover, presence of 3-phenyl-2-butanone and γ-selinene in essential oil of agar wood has been reported [18,19].

4. Conclusions

We have reported presence of preliminary phytochemicals, TLC fingerprints and GC-MS analysis of essential oil of G.walla for the first time in Sri Lanka. Present study revealed the presence of tannins, saponins, steroidal glycosides, flavonoids and alkaloids in all three parts tested. Moreover, TLC fingerprints could be successfully used for the identification of stem and leaf samples even in powder form. Presence of special aroma containing compound such as γ-selinene and β-patchoulene (73.86%) indicates that this has very good potential for commercial production of excellent perfume and other scented products. However, further optimization of distillation method could be suggested.

Conflicts of Interests

Authors declare that there is no conflict of interest.

References

[1]   | Jayaweera, B.M.A., Medicinal plants (Indigenous and Exotic) used in Ceylon. Natn. Sci. Coun. Sri Lanka. 1982.
[2]   | Chaudhari, D.C., Agarwood from Aquilaria malaccensis, A.agallocha, Roxb. MFP News 3.12-13. 1993.
[3]   | Qi, S. and He, M., Production of 2-(2-phenylethyl) chromones in cell suspension cultures of Aquilaria sinensis. Plant Cell, Tissue and Organ Culture 83, 217-221. 2005.
[4]   | Barden, A., Noorainie A.N., Teresa M. and Michael S., “Heart of the matter. Agarwood Use and Trade and CITES Implementation for Aquilaria malaccensis.” TRAFFIC Network, August 2000.
[5]   | Yukie Okudera., Michiho Ito., Production of agar wood fragrant constituents in Aquilaria calli and cell suspension cultures. Plant Biotechnology 26, 307-315. 2009.
[6]   | Surya Hadi., Handa Muliasari., Nia Silvia Sukma., Putu Eka Wahyu Ratnaningsih., Phytochemical screening and antibacterial testing of gaharu trees (Gyrinops versteegii (Gilg) Domke) from Lombok Island. Proceedings of the 2nd International Seminar on Chemistry, 79-82.
[7]   | Marina Antonopoulou., James Compton., Lisa, S., Perry and Razan Al-Mubarak., The trade and use of agar wood (oudh) in the united Arab. TRAFFIC Southeast Asia. Malaysia. 2010.
[8]   | Jensen, A., Ecological, socio-economic and trade aspects of conservation of Aquilaria spp. and agar wood in Lao P.D.R. Conference Booklet. Second International Agarwood Conference and Workshop. Bangkok and Koh Chang, Thailand. 2007.

[9]  
Ibrahim, R,, Majid A.B.D., Salahbiah and Norazlina., In vitro mutagensis and application of advanced bioreactor technology for mass propagation and cell cultures of Aquilaria malaccensis. Conference Booklet. Second International Agarwood Conference and Workshop. Bangkok and Koh Chang, Thailand. 2007.

[10]   | Farnsworth, N.R., Biological and phytochemical screening of plants. Journal of Pharmaceutical Science. 55, 225-276. 1966.
[11]   | Stahl, E., Thin Layer Chromatography. A Laboratory hand book. 2nd Ed. 854-859 Springer international student edition, 1969.
[12]   | Shahare, M.D. and Mello, P.M., Standardization of Bacopa Monnieri and its Formulations with reference to Bacoside A, by High Performance Thin Layer Chromatography. International Journal of Pharmacognosy and Phytochemical Research, 2 (4) 8-12. 2010.
[13]   | Palani Samy Hariprasad and Natesan Ramakrishnan., HPTLC fingerprint profile of Rumex vesicarius L. Asian J Pharm Clin Res, 4(2), 134-136. 2011.
[14]   | Kuppusamy Sujatha., Krishnan Chitra., Haritha Polisetti., Sarika Karri., Sahitya Nimmalapudi and C. Umamaheswara Reddy., Standardization of Calendula officinalis L. with Reference to quercetin by high performance thin Layer chromatography. IJRPC, 1(4) 789-792, 2011.
[15]   | Subasinghe, S.M.C.U.P. and Hettiarachchi, D.S., Agarwood resin production and resin quality of Gyrinops walla Gaertn. Int. J. Agric.Sci 3, 357-362, 2013.

[16]  
Wetwitayaklung, P., Thavanapong N., Charoenteeraboon, J., Chemical constituents and antimicrobial activity of essential oil and extracts of heartwood of Aquilaria crassna obtained from water distillation and supercritical fluid carbon dioxide extraction. Silpakorn Univ. Sci. Tech. J. 3(1) 25-33. 2009.

[17]   | Md. Nazrul Islam Bhuiyan., Jaripa Begum and Md. Nurul Huda Bhuiyan., Analysis of essential oil of eaglewood tree (Aquilaria agallocha Roxb.) by gas chromatography mass spectrometry. Bangladesh J Pharmacol . 4: 24-28, 2009.
[18]   | Nor Azah, M.A., Chang, Y.S., Mailina, J., Abu Said, A, Abd. Majid, J. Saidatul Husni, S., Nor Hasnida H. and Nik Yasmin Y., Comparison of chemical profiles of selected gaharu oils from Peninsular Malaysia. The Malaysian Journal of Analytical Sciences, 19(2), 338-340, 2008.
[19]   | Saiful Nizam Tajuddin., Norfatirah, S., Muhamad., Mohd, A., Yarmo and Mashitah M. Yusoff., Characterization of the chemical constituents of agar wood oils from Malaysia by comprehensive two-dimensional gas chromatography–time-of-flight mass spectrometry. Mendeleev Commun., 23, 51-52.2013.